1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.statementservice.retriever; 18 19 import org.json.JSONObject; 20 21 /** 22 * Factory to create asset from JSON string. 23 */ 24 /* package private */ final class AssetFactory { 25 26 private static final String FIELD_NOT_STRING_FORMAT_STRING = "Expected %s to be string."; 27 28 private AssetFactory() {} 29 30 /** 31 * Checks that the input is a valid asset with purposes. 32 * 33 * @throws AssociationServiceException if the asset is not well formatted. 34 */ 35 public static AbstractAsset create(JSONObject asset) 36 throws AssociationServiceException { 37 String namespace = asset.optString(Utils.NAMESPACE_FIELD, null); 38 if (namespace == null) { 39 throw new AssociationServiceException(String.format( 40 FIELD_NOT_STRING_FORMAT_STRING, Utils.NAMESPACE_FIELD)); 41 } 42 43 if (namespace.equals(Utils.NAMESPACE_WEB)) { 44 return WebAsset.create(asset); 45 } else if (namespace.equals(Utils.NAMESPACE_ANDROID_APP)) { 46 return AndroidAppAsset.create(asset); 47 } else { 48 throw new AssociationServiceException("Namespace " + namespace + " is not supported."); 49 } 50 } 51 } 52
